Improvement in lamps



Patented sep 1.22,1874.

0 S W EEN E Y L a m p s THE RAPHIC C0, FH'OID-LITHJSl .4| PARK FLACEJNXi60/wy No .l55,343.

.l NITED STATES OLIVER SWEENEY, OF PHILADELPHIA7 PENNSYLVANIA.

IMPROVEMENT IN LAMPS.

Specification forming part of Letters Patent No. 155,343, datedSeptember 22, 1874,' application filed June 18, 1874.

To all whom t may concern:

Be it known that I, OLIVER SWEENEY, of Philadelphia, Pennsylvania, haveinvented an Improvement in Reservoirs for Lamps or IlluminatingApparatus, of which the following is a specification:

My invention relates to that class of lamps 'in which volatileburning-duid contained in a reservoir is caused, by a piston and spring,to pass upward to a burner or burners; and the object of my invention isto make a safe lamp of this class by constructing it in the mannerillustrated in section in the accompan yin gdrawlng.

A is the fountain or reservoir of the lamp or illuminating apparatus,and consists of a cylindrical vessel closed at the bottom, with theexception of a small opening` communicating with api pe, B, referredtohereafter, and furnished at the top with a screw-cap, F. Within thevessel is a piston, l), which is so packed that it will fit snugly, butcan move freely in, the inside of the vessel, the piston being composed,in the present instance, of two plates with intervening packing. To thepiston is secured a hollow rod. E, passing through a stufng-box, a, inthe screw-cap F, the rod terminating at the top in a suitable burner, b,below which there is an ordinary cock, d. Between the screw-cap and thetop of the piston intervenes a spiral spring, G, of suicient strength tocause the piston to bear with considerable pressure on the surface otthe burning-fluid in the vessel A. The piston is furnished with a valveor valves, c, two in the present instance, each valve opening downward,and the stem of the valve being guided by a small bridge secured to thetop of the piston, between which bridge and the head of the stemintervenes a light spiral spring, the latter tending to maintain thevalve in contact with its seat.

The pipe B above referred to is bent upward and receives a portion of asmaller pipe, H, carrying a burner, t', to which the uid may beadmitted, or from which it may be cut oft' by manipulating a cock, i.The pipe H,

which should be suitably packed where it fits into the pipe B, may beadjusted vertically in the latter, and secured by a set-screw, d, afteradjustment.

The pressure of the spring G on the piston D is sufficient to insure theconstant flow of burning-fluids through the hollow piston-rod -to theburner b, and through the pipes B and H to the burner i, so that thelluids may be ignited at either or both of the burners, orat otherburners communicating with the vessel A.

I/Vhen the spring G ceases to perform its duty and the vessel requiresto be replenished, fresh Huid may be poured through a nozzle, m, towhich a suitable stopper is adapted. This piston is then raised by meansof handles x on thc tubular rod E, when the valves c will be opened.rlhe fluid will pass into the space below the piston, and the spring'will be compressed prepara-tory to the performance of its properduty-that of forcing the iiuid to the burners through the medium of thepiston.

It should be understood that no new principle is involved in theabove-described lamp, the piston, with its valves, being old, and thespring for actuating the piston being also old. It will be remarked,however, that the volatile tluid cannot gain access to orpenetratethrough the stuffing-box, owing to the peculiar construction ot thelamp.

I claim as my invention- In a lamp having a coiled spring bearingdownward on a valved piston and a burner communicating with theoil-space under the piston, the combination of the air-tight reservoir,piston-rod, and packing-box, as and for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

OLIVER SWEENEY.

Witnesses WM. A. STEEL, THoMAs McILvAIN.

